Rule34.GG

Regular 1boy
2015
alien
armor
clangbanger
cybertronian
decepticon
digital media (artwork)
erection
helmet
horn
humanoid
humanoid penis
living machine
looking at viewer
machine
male
male only
megatronus
megatronus prime
penis
robot
simple background
sitting
solo
transformers
transformers robots in disguise (2015)
unusual anatomy
unusual genitalia
unusual penis